Patents by Inventor Robert C. Dunigan

Robert C. Dunigan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11673781
    Abstract: A fork for an industrial vehicle such as a forklift, and a method of making the same. The fork includes an elongate body portion, a toe portion, and, optionally, a heel portion. The elongate body portion may be formed in any length and coupled to the toe portion (and optionally, to the heel portion) to form a fork.
    Type: Grant
    Filed: October 25, 2021
    Date of Patent: June 13, 2023
    Assignee: HYSTER-YALE GROUP, INC.
    Inventor: Robert C. Dunigan
  • Patent number: 11667504
    Abstract: A fork for an industrial vehicle such as a forklift, and a method of making the same. The fork includes an elongate body portion, a toe portion, and, optionally, a heel portion. The elongate body portion may be formed in any length and coupled to the toe portion (and optionally, to the heel portion) to form a fork.
    Type: Grant
    Filed: October 14, 2021
    Date of Patent: June 6, 2023
    Assignee: HYSTER-YALE GROUP, INC.
    Inventor: Robert C. Dunigan
  • Publication number: 20220063972
    Abstract: A fork for an industrial vehicle such as a forklift, and a method of making the same. The fork includes an elongate body portion, a toe portion, and, optionally, a heel portion. The elongate body portion may be formed in any length and coupled to the toe portion (and optionally, to the heel portion) to form a fork.
    Type: Application
    Filed: October 14, 2021
    Publication date: March 3, 2022
    Applicant: Hyster-Yale Group, Inc.
    Inventor: Robert C. Dunigan
  • Publication number: 20220055878
    Abstract: A fork for an industrial vehicle such as a forklift, and a method of making the same. The fork includes an elongate body portion, a toe portion, and, optionally, a heel portion. The elongate body portion may be formed in any length and coupled to the toe portion (and optionally, to the heel portion) to form a fork.
    Type: Application
    Filed: October 25, 2021
    Publication date: February 24, 2022
    Applicant: Hyster-Yale Group, Inc.
    Inventor: Robert C. DUNIGAN
  • Patent number: 11235963
    Abstract: A fork for an industrial vehicle such as a forklift, and a method of making the same. The fork includes an elongate body portion, a toe portion, and, optionally, a heel portion. The elongate body portion may be formed in any length and coupled to the toe portion (and optionally, to the heel portion) to form a fork.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: February 1, 2022
    Assignee: HYSTER-YALE GROUP, INC.
    Inventor: Robert C. Dunigan
  • Patent number: 11161535
    Abstract: A load wheel assembly for a pallet truck includes a first load arm that rotates about an axis of rotation, and a load wheel rotationally coupled to an end of the first load arm opposite from the axis of rotation. The load wheel supports a fork at an elevation above the load wheel. Additionally, the load wheel assembly includes a second load arm pivotally coupled to the first load arm at the axis of rotation and forming a load arm angle, and an adjustment mechanism further coupling the second load arm to the first load arm. The adjustment mechanism varies the load arm angle formed between the first load arm and the second load arm to adjust the elevation of the fork above the load wheel.
    Type: Grant
    Filed: April 6, 2020
    Date of Patent: November 2, 2021
    Assignee: HYSTER-YALE GROUP, INC.
    Inventor: Robert C. Dunigan
  • Publication number: 20200231199
    Abstract: A load wheel assembly for a pallet truck includes a first load arm that rotates about an axis of rotation, and a load wheel rotationally coupled to an end of the first load arm opposite from the axis of rotation. The load wheel supports a fork at an elevation above the load wheel. Additionally, the load wheel assembly includes a second load arm pivotally coupled to the first load arm at the axis of rotation and forming a load arm angle, and an adjustment mechanism further coupling the second load arm to the first load arm. The adjustment mechanism varies the load arm angle formed between the first load arm and the second load arm to adjust the elevation of the fork above the load wheel.
    Type: Application
    Filed: April 6, 2020
    Publication date: July 23, 2020
    Applicant: Hyster-Yale Group, Inc.
    Inventor: Robert C. DUNIGAN
  • Publication number: 20200156911
    Abstract: A fork for an industrial vehicle such as a forklift, and a method of making the same. The fork includes an elongate body portion, a toe portion, and, optionally, a heel portion. The elongate body portion may be formed in any length and coupled to the toe portion (and optionally, to the heel portion) to form a fork.
    Type: Application
    Filed: November 21, 2018
    Publication date: May 21, 2020
    Applicant: Hyster-Yale Group, Inc.
    Inventor: Robert C. Dunigan
  • Patent number: 10618539
    Abstract: A load wheel assembly for a pallet truck includes a first load arm that rotates about an axis of rotation, and a load wheel rotationally coupled to an end of the first load arm opposite from the axis of rotation. The load wheel supports a fork at an elevation above the load wheel. Additionally, the load wheel assembly includes a second load arm pivotally coupled to the first load arm at the axis of rotation and forming a load arm angle, and an adjustment mechanism further coupling the second load arm to the first load arm. The adjustment mechanism varies the load arm angle formed between the first load arm and the second load arm to adjust the elevation of the fork above the load wheel.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: April 14, 2020
    Assignee: HYSTER-YALE GROUP, INC.
    Inventor: Robert C. Dunigan
  • Patent number: 10549972
    Abstract: A battery box and fork system for a vehicle having a first fork and a second fork configured to support one or more pallets positioned along a length of the first fork and the second fork. The first fork and the second fork are each independently lockable at their heel ends to a battery box.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: February 4, 2020
    Assignee: HYSTER-YALE GROUP, INC.
    Inventors: Robert C. Dunigan, Kenneth Williams
  • Publication number: 20180251145
    Abstract: A load wheel assembly for a pallet truck includes a first load arm that rotates about an axis of rotation, and a load wheel rotationally coupled to an end of the first load arm opposite from the axis of rotation. The load wheel supports a fork at an elevation above the load wheel. Additionally, the load wheel assembly includes a second load arm pivotally coupled to the first load arm at the axis of rotation and forming a load arm angle, and an adjustment mechanism further coupling the second load arm to the first load arm. The adjustment mechanism varies the load arm angle formed between the first load arm and the second load arm to adjust the elevation of the fork above the load wheel.
    Type: Application
    Filed: March 2, 2018
    Publication date: September 6, 2018
    Applicant: Hyster-Yale Group, Inc.
    Inventor: Robert C. DUNIGAN
  • Patent number: 5491373
    Abstract: An improved commutator anchoring system and methods of manufacturing such a system are disclosed. The system includes a wound fiberglass or other ring embedded in the internal core of the commutator to reinforce the resulting structure and enhance its thermal and mechanical stability. The reinforcing ring also functions as a form about which various anchors can be patterned, increasing their uniformity over free-form designs.
    Type: Grant
    Filed: September 7, 1994
    Date of Patent: February 13, 1996
    Assignee: The Morgan Crucible Company plc
    Inventors: David L. Cooper, Robert C. Dunigan, Joseph M. Grenier, Eric G. Lee
  • Patent number: D919165
    Type: Grant
    Filed: August 13, 2018
    Date of Patent: May 11, 2021
    Assignee: HYSTER-YALE GROUP, INC.
    Inventor: Robert C. Dunigan